Leviticus 23:39-44

39Howbeit on the fifteenth day of the seventh month, when ye have gathered in the fruits of the land, ye shall keep the feast of the LORD seven days: on the first day shall be a solemn rest, and on the eighth day shall be a solemn rest. 40And ye shall take you on the first day the fruit of goodly trees, branches of palm trees, and boughs of thick trees, and willows of the brook; and ye shall rejoice before the LORD your God seven days. 41And ye shall keep it a feast unto the LORD seven days in the year: it is a statute for ever in your generations: ye shall keep it in the seventh month. 42Ye shall dwell in booths seven days; all that are homeborn in Israel shall dwell in booths: 43that your generations may know that I made the children of Israel to dwell in booths, when I brought them out of the land of Egypt: I am the LORD your God. 44And Moses declared unto the children of Israel the set feasts of the LORD.